A friend wants to get all of his equipment out of his std cab stepside and put it in the bed. Conventional blow-thru methods involved cutting the entire piece of metal out from under the back window and the front of the bed. This is not an option for him. I am in the process of designing an enclosure that would only require minimal cutting of his truck. Im currently considering a Fourth order three chamber single reflex bandpass enclosure. Pic is below. The port(s) will be the only thing that will protrude into the cab.